... Built-in 87.5 – 108 MHz FM digital radio module; automatically store 50 radio stations, high sensitivity telescopic antenna installed. * Built- ... ) * Universal 3.5mm earphone audio output port; earphone audio frequency range between 50 Hz - 18KHz; * Both charging and audio ... chip , while power off, to memorize songs , volume , radio stations , function and setup you store previously; Never lose what ...